Yes, Pothos is installed and all apps can see the LimeSDR. LimeSuite runs fine. I’ve used it multiple times to update firmware. Currently at 17.07.0 I’m using Windows drivers. Win10 64bit.
I’ve had my board for ~ 5+ months now. I have it working with lots of apps. GRC, CubicSDR, GQRX, Qspectrumanalyzer, URH, SDRConsole V3, HDSDR, SDR# etc.
When I launch SDRangel, here’s the opening screen:
Hi, i tried to test the Lime with sdrangel, but i’am not able to start sampling. Is there a need for extra configuration of the limesdr to start sampling? Here is a screen shot from my PC. Or maybe some controls are missing?
Drag the bottoms of the control windows on the left down to reveal all of the controls. Hit the check mark next to LimeSDR to connect to it. Set a frequency into the counter. Start the blue play arrow under the RO tab. That should get you something.
Ok, i think it is not possible to reveal all of the controls. There seems to bee a maximum size for expanding the ‘Sampling device control’ window. It is possible to drag and make it smaller but i can not make it larger as shown in the screen shot above.
Maybe somebody has tested sdrangel on 4K displays? Is it possible that there is a maximum size defined in the program code for “sampling device control”? Somebody has another idea?
How is the development going with SDRAngel for transmit audio? When you have a chance let us know if there’s been any improvement in the transmit audio and CW since the last message - TNX ex 73,
I have tested Tx audio on a comm tester and a Yeasu HT. At first it was very distorted and full of harmonics. I played around with decimation, sampling rates, and gain, and was able to produce a pure tone. Something goes wrong when decimation is being changed. Sometimes, but not always, the tone gets divided or multiplied. The same thing happens to voice. This also happens if you have a source and a sink going at the same time. Once it is set to sound good it sounds as good as it can get with the little pinhole microphone on my laptop. Now for a GPIO toggle for Tx/Rx to switch an amp
have you tried with a sample rate no greater than 5 MS/s? it runs fine for me for sample rates between 3 and 5 MS/s. There is no point using a larger sample rate for audio and CW. To raise the final sample rate at the DAC you can use the hardware interpolator which is a great advantage of the Lime. With 5 MS/s host to device rate and a hardware interpolation of 8 you already have 40 MS/s at the DAC.
Also for audio/CW in AM, NFM, SSB the sample rate at the modulator should be no lower than 48 kS/s which is the audio sample rate being used. So on the other hand you must make sure that the sample rate you choose for the host to device rate divided by the software interpolation factor yields a value greater or equal to 48 kS/s.
I just added a sink and a modulator and used the tone generator or mic input in sdrangel. I then ran the rf output to an R&S CMS 57 which can demodulate and measure distortion and also display the rf spectrum.
BTW, there is a huge delay between audio input and transmit.
I just tried to find out what the settings I used were and all I can get is robot voice or skipping or scratchy or pitch shifted or clear voice with a 10 second delay.
Edouard - I’ll give that a try later and see if that fixes the issues with the ‘robotic voice’ in transmit. I’m assuming that this sample rate adjustment is on one of the adjustment settings on the SDRAngel GUI, right? Please let me know and thanks for the reply and good information, Edouard,
@F4EXB can u help me with debugging? 64 bit version crashes after it loads the main gui (“app. unresponsible error”) Tried that on my x220t ThinkPad with win10 x64 and x200t win7 x64… The only one machine that can run the win64 version is my gf’s x201t win7 x64 and my x220t under linux:). Every sw is up to date and LimeSDR works as it expected… Can we do some debugging ?
Can we do some debugging ? 